#18BBCD
Closest named color: Turquoise Blue (#06B1C4). oklch(72.5% 0.121 207.3), rgb(24, 187, 205).
Aa
Black text reads best on this color (9.02:1).
About this color
#18BBCD is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.121 and its hue 207°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.030 away. Black text reads best on it, at 9.02:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.02:1 |
| White text | 2.32:1 |
Values
| HEX | #18BBCD |
| RGB | rgb(24, 187, 205) |
| HSL | hsl(186, 79%, 45%) |
| OKLCH | oklch(72.5% 0.121 207.3) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #18BBCD | 2.32:1 | Fails | Lc -50.2 | Large or bold text, headings |
| Black text on #18BBCD | 9.02:1 | AAA | Lc 58.7 | Large or bold text, headings |
| #18BBCD text on white | 2.32:1 | Fails | Lc 45.3 | Large or bold text, headings |
| #18BBCD text on black | 9.02:1 | AAA | Lc -56.8 | Large or bold text, headings |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 400.
-
Step 50
50
#EEF7F9
oklch(97% 0.01 212.5)
-
Step 100
100
#DAEEF1
oklch(93.5% 0.022 207.6)
-
Step 200
200
#BAE2E7
oklch(88.6% 0.042 205.7)
-
Step 300
300
#84CFDA
oklch(80.9% 0.076 207.6)
-
Step 400
400 (this color)
#18BBCD
oklch(72.5% 0.121 207.3)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A63
oklch(42.7% 0.073 206.6)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#18BBCD with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #AAB3CE | 0.118 |
| Deuteranopia (no green cones) | #93A3CD | 0.107 |
| Tritanopia (no blue cones) | #00C4C0 | 0.037 |
| Achromatopsia (no color) | #AAAAAA | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18BBCD
#18BBCD
oklch(72.5% 0.121 207.3)
- #E8877C
#E8877C
oklch(72.5% 0.121 27.3)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #18BBCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.030
- Topaz #13BBAF ΔE 0.045
- Light Sea Green #20B2AA ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.053
- Vivid Sky Blue #4CC9F0 ΔE 0.065
- Medium Turquoise #48D1CC ΔE 0.070
- Deep Sky Blue #00BFFF ΔE 0.072
- Bright Sky Blue #02CCFE ΔE 0.076
Use #18BBCD in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.